The euphemism is corpulent.
An euphemism for talking could be "communicating" or "having a conversation."
The euphemism for hobo is "homeless person" or "street person."
A euphemism for fat is "pleasingly plump". A euphemism for feeling sick is feeling "under the weather". A euphemism for being fired is being "laid off".
A common euphemism for "thief" is "a person of sticky fingers."
Stocky - Another euphemism or nice way of saying that a person is "large". This word does not, however, necessarily mean "fat." A stocky person is large, but his stockiness could be the result of a big frame on a big-boned body.
The common euphemism for old person is "senior citizen". The word elderly is often used in context, as is mature.
Euphemisms for a black person include: a "person of color" an "African American" an "American of African decent"
euphemism for helper
Chubby is more mitigated, implying less fat. Plump may be taken badly, but generally confers slight fatness with good bodily proportion.
euphemism for helper
euphemism for helper